Air purifier



FIG. 1 is a perspective view of an air purifier showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a right-side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is an enlarged detail view of area 8 circumscribed within FIG. 1; and,

FIG. 9 is another perspective view showing the air purifier in a state of use.

The evenly spaced broken lines depict portions of the air purifier that form no part of the claimed design. The dot dash dot broken lines in FIGS. 1 and 8 depict the boundary of the enlarged view of FIG. 8, taken from FIG. 1, and form no part of the claimed design. 

CLAIM We claim the ornamental design for an air purifier, as shown and described. 